122787089 has 2 divisors, whose sum is σ = 122787090. Its totient is φ = 122787088.

The previous prime is 122787037. The next prime is 122787103. The reversal of 122787089 is 980787221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87740689 + 35046400 = 9367^2 + 5920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122787089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122787289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61393544 + 61393545.

It is an arithmetic number, because the mean of its divisors is an integer number (61393545).

Almost surely, 2^122787089 is an apocalyptic number.

It is an amenable number.

122787089 is a deficient number, since it is larger than the sum of its proper divisors (1).

122787089 is an equidigital number, since it uses as much as digits as its factorization.

122787089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 122787089 is about 11080.9335798027. The cubic root of 122787089 is about 497.0318672408.

The spelling of 122787089 in words is "one hundred twenty-two million, seven hundred eighty-seven thousand, eighty-nine".